Locking mechanism for controller-handles.



No. 867,482. PATENTBD-OGT. 1, 1907. Q A. S. CUBITT. LOCKING MECHANISM FOR CONTROLLER HANDLES-p APPLICATION rILnn- JAN. 2. 1906.

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5 flttq No. 867,482. PATENTED 001. 1, 1907.

' A. GUBITT.

LOOKING MECHANISM FOR CONTROLLER HANDLES.

' APPLICATION rum) 3111.2. 1906.

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UNITED ST TE-s PATENT OFFICE.

ARCHIBALD S. OUBITT, OF SGHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

Looxme MECHANISM FOR CONTROLLER-HANDLES.

Specification of Letters latent.

Patented Oct. 1 907.

'Applioation lfiled January 2,1906. Serial No- 294,091.'

To all. whom it may concern:

Be it known thatI, Ancnmsm) S. Cum-1'1, a subject of the King of Great Britain, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Locking Mechanism for Controller-Handles, of which the following is a specification.

It is sometimes desirable in the case of controllers, such as the ordinary electric streetcar controllers, or other movable devices, to provide means for aiitomatically and positively stopping them at a predetennined point or points in their movement; and the prese'nt r invention comprises a simple and novel construction and arrangement of parts, to be hereinafter described and particularly pointed out in the claims, for effecting this result. I have illustrated preferred embodiments of the present invention in the accompanying drawings, wherein: Figure l is a cross-section through a controller handle and the top of a controller casing; Fig. 2 a bottom plan view of the handle; Fig. 3 a vertical cross-section through the grip of the controller handle; and Figs. 4,

5 and 6, are views corresponding to Figs. 1, 2 and 3, re-

spectively, showing a further modification.

It is, of course, understood that although the present invention, is illustrated and will be described in detail as applied to the handle of an electric motor controller, it may be employed in connection with handles other than controller handles and with movable devices other than handles of any kind. 7

Reference being had to the drawings, 1 indicates a handle mounted upon the upper end of'a controllercylinder-supporting shaft 2 for rotating the same; 3 is the top of the controller casing through which the shaft 2 projects. Upon the casing 3 is arranged a toothed segment 4 which cooperates with a dog 5 on the controller handle to positively arrest the controller in its several running positions. The dog 5 is pivotally supported on theapin 6 for movement in a vertical plane and is normally held in its locking position by spring 7. All these parts are substantially the same as corresponding parts in controllers having segments and dogs adapted to hold the controller in predetermined posi-' tions, except that the teeth on the segment are prefer ably ratchet teeth, as shown at 4 and 4 in order to permit the controller to be brought into the off position without interference; also the opening 10 in-the dog, through which the supporting pin passes, is so 'formed that the dog may oscillate laterally between shoulders 11 and 12, being normally held in acentral position by springs 13 and 14.

In the construction shown in Figs. 1-3 a push but- ;ton 8, having a stem 9, is adapted! engage one end of by a pin 9 and the lower end of the stein is made U- shaped so that when the-locking dog is in its normal position. las shown in Figs. 2 and 3 thepush button may be depressed without affecting thedog, the aims l5 and 16 of the U-shaped portion simply passing by however, the handle is moved either to the right erto the left of its off position, the dog strikes against the vertical face of one of the teeth on the segment 4 and its movement is arrested. The controller handle is, however, free to continue its movement until the shoulof the locking dog, whereupon the handle itself is held against a continuation of its movement. This operation has brought the rear end of the .dog directly below one of the arms 16 or 16, as the case may be, so that if the push button is now depressed, the locki g dog is lifted out of. engagement with the tooth on the segment, releasing the handle. The handle may now be turned freely until it reaches the next position, namely until it is arrested ment.

been operated to. release the dogfrom a tooth or stop,

pressed, expands and returns the dog. into its centml position so that it is impossible [or the operator to maintain the dog raised out of the plane of. the teeth on the segment and therefore he cannot move the conpmg. f In Figs. 4, 5 and 6, instead of employing a push'button to operate the dog to release the controller handle, I make the entire grip of the controller handle movable, so that when the controller handle is being turned in a forward direction it'is releasedin its various positions through a slight forward movement of' the grip,

merits of the controller handle by a-slight backward movement of the grip. For this purpose the gripl'l between shoulders 19 and 20 on the handle and held in a central position byssprings 21 and 22. At the lower end ofthe grip or the stem upon which thegrip is mounted is arranged all-shaped cam 23 so constructed'that, when the locking dog is in its normal-position, the grip may be oscillated ineither'direction Without moved into either extreme position laterallyof "th by the next succeeding tooth on the seg- It will be noted that as soon as the push button has while -the release is effected during backward movedisturbing the dog; while, when the doghasbeeh' controllerharidle, an oscillatory movement of. the

the dog to move it out of the plane of the ratchet teeth against the tension of the spring when the push button is depressed The movement of the stein 9 is limited the rear end of the dog on opposite sides thereof. when,

der 11 or 12, as the case may be, abuts against the side the spring .13 or 14, which has previously been com- 1 troller handle through successive steps without stopis pivoted on a horizontal pin 18, being free to oscillate will cause 'the cam depress'the rear end of the dog in the same' i manner that this is-done by the arms and oscillating the grip in the Idle has beenmoving. t 1 a The arrangements'illus trated are adapted for use 16 in. the push-button construction.

The rear end of the dog 5 is' pieferably provided with a loose piecej' held in position by a spring 5', as i,llus

trated.v This prevents binding of or injury to the parts in casethe'jreleasing member is held down by the )perator when approaching a'tooth in'the segment. Also in the case o'i tli'e' construction shown in Figs. 4-6, in

which the-lgfip normally oscillated in the direction .iiiwhieh the handle'is being moi ed,- the member 5' eid 'intlie central tpositionliayj the notch 23 inthe 1 earn while thedo'g ismoving laterally, Then, when the grip isreleased-'oribrought to its normal position, 15

the member 5" snaps into alinement .with the main portion of the dog, whichmayf then be released by again direction inwhich -the hanwith handles ordevicesarranged to move in either di- "rection from an intermediate" or off position; but if onlyone of. these movements is required, then one oi the sets of teeth, 4 and 4 ;'may be omitted, the locking dog need not he made to oscillatepin both directions irom'its centralposition, and only one operating pro-.

' jection is required on the push button or on the .pivoted Patentot the United S'tates,1is,i

' operating member, and a stop located in the path of said dog when the device is moved, the arrangement being suchthatj the stop engages said dog and moves it into operative relation with its said,operating ,member and arrests the movement of said device.

-2. In" combination, a-movahle device, a stop, a dog ca'r,'

. ried by said device and lying normallyin the plane ofsald stop for engagement therewith to arrest-the said device, a member adapted to move said dog out of the plane of said stop, and means controlled by said stop for moving I said, dog fout of operative relation with said operating member.

3. In combination, a movable device, a lock for saiddevice comprising a fixed stop and a dog carried by 'said device, a releasing member for said dog normally out of operative relation thereto, said dog being moved into operative relation to its releasing member by said stop.

a In combihation, a movable device, adog carried by said device and having limited movement in planes at an angle to each other, a member adapted to operate said dog in one of said planes and normally out of operative relation to said dog, a stop mounted on a fixed member and 'ndaptedto be engaged by said dog and to move it in the other of said planes intooperativerelation to said operating member. I

' 5.,A controller handle provided with a dog having a limited movement in two planes at an angle to cli ch other, a device adapted to operate said dog in one 0! said planes, and a spring .for holding said dog'outv of operative, relation to said device. i t

6. In combination a s'top, and a movable device cooperating with said stop and comprising a dog mounted onsajid device and movable between limits in the direction .oY-.-ni ovement oftsaidydevice and having afar-thermovementflintoand outof engagement with'said stop, are- I ieasingmember cooperating with said dog only when the dogis at'one ot its limits of movement, and means for moving said do; to the other of said limits.

mounted on said device and adapted to'engage said stop,

7. ln' combination, a movable device, a stop, a' dog an operating member forsaid dog, and means tending normaliy to 'r'no've said dog in the plane of movement of said device and out of the path of movement of said operating member.

' 8. In combination a'movable device, a locking dog on said device, a member for operating said dog normally outv of operative relation to said dog, and a stop mounted on a'iixe'd support and adapted to engage said dog and move it into operative relation to saidoperating member.

9. In combination, a movable device, a stop, a dog on said device adapted to engage said stop, an operating member for releasing the dog from the stop, and a spring for disconnectin'g saiddog from said operating member when the dog is released. from the stop.

' 10. In combinationya movable device, a stop, a dog carried by said device, an operating member for sald.dog, meansfor holding.said dog normally out of operative relation to said operating member, the arrangement being such thatthe dog is brought into operative relation with the operating member only when the dog is in engagement with the stop. g

In witness whereof, I have hereunto set my hand this 30th day of December, 1905. I

' ARCHIE S. CUBITT. Witnesses: BEN-TAMXN B. Hunt,

HELEN Onroao. 

